How To Fix Broadcom 4311 in Ubuntu 12.04/ 14.04

Previously you check in terminal,

$ lspci | grep BCM

 

04:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)

If yes,continue to process this

1.Remove the BCM driver (standart SAT) in the kernel.

Go to terminal command:

$ sudo apt-get remove bcmwl-kernel-source

2. Install alternative driver

$ sudo apt-get install firmware-b43-installer b43-fwcutter

3. Restart Computer

$ sudo reboot

Good luck..

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